Then you would be taking the long trip down through empty air.

Then I heard a strange, small sound in the empty air.

My order must have seemed to come from empty air.

The next, the empty air was singing in its place.

But look at all that empty air between now and then!

I put up my hands, but they felt only empty air.

And she was gone so suddenly the last word almost seemed to come from empty air.

He asked the question of the empty air and got no answer.

His hands reached out to the south, into the empty air, with nothing to hold on to.

With ten thousand feet of empty air just a step away.